Apparatus for cementing the filaments of electric lamps to the stem-wires.



No. 869,317. PATENTED OCT. 29. 1907. N.YMARSHALL.

APPARATUS FOR GEMENTING THE PILAMENTS 0F ELECTRIC LAMPS TO THE STEM WIRES. APPLICATION FILED umzv. 1906.

2 sums-SHEET Q fivaezdvm (q No. 869,317. PATENTED 00129. 1907.

N. MARSHALL. I

APPARATUS FOR GEMENTING THE PILAMENTS OF ELECTRIC LAMPS TO THE S'TEM WIRES.

APPLIOATION FILED JAN. 27. 1906.

W 2 SHEETS-SHEET 2.

lIlli ll" Wag 5565. Ira/awn UNITED STATES PATENT OFFICE.-

NORMAN MARSHALL- OF NEWTON, MASSACHUSETTS.

APPARATUS FOR- CEMENTING THE FILAMENTS OF ELECTRIC LAMPS TO THE .STEM- WIRES.

'Specification of Letters Patent;

Patented Oct. 29, 1907.

i Application filed anuary 271 1906- Serial No. 298M33- To all whom it may com-cm:

Be it known that I. NORMAN llIAItSHALL, a citizen of the United States, and a resident of Newton, Massachu- -menting the filaments ofincandescent electric lamps to the stem wires and its object is to provide means whereby the securing of the filaments to the stem wires may be accomplished quickly, conveniently and uniformly with a resulting reduction in the cost of this operation vin manufacturing lamps. I

In practicing my invention the stem wires and filament ends are readily and uniformly brought into proper relation by the employment of devices for positioning the stem wires and cooperating devices for positioning the filaments, the devices being so supported or mounted that a relative movement between them may be effected in bringing the devices into suchrelation that the stem wires and filament" ends will be in juxtaposition when introduced or when held in the positioning devices. The positioning devices may be of any suitable form and construction which will best HIGH-l the requirements of the conditions under which the machine in which the features of the invention are embodied is to operate.

They may for instance be merely holding devices which. hold the stems and fila- -ments with the stem wires and filament ends in definite positions so that by relative movement oi the holding devices the stem wires and filament ends -may be brought together where the cement may be appliedor where the wires and filament ends will be united by the cement previously applied to either the wires or filament ends, or the positioning devices may be devices which will act to guide or to bring the wires and filament ends into definite positions as the parts are introduced into the positioning devices, or the filament holding devices may operate to bring the filament ends into proper relative position after the filaments have been inserted. Either or both of the devices may be mov able and either or both may be moved in effecting the means for guiding the filament end or wire into position.

The broader features of my invention may be embodied in machines in which the application of the cement to either the stem wires or ends of the carbon filais performed manually but I prefer in embodying my invention in an efficient and rapidly operating apparatus to provide means for applying the cement.

in a machine or apparatus for rapidly cementing the filaments to the stem wires, I have employed certain features of invention which are of importance while they are not essential to the broader features.

The various features of the invention will be understood from the following detailed description of the machine which I have shown in the accompanying drawings for the purpose of illustrating one concrete embodiment of the various features of the invention. I

In these drawings-Figure 1 is a front elevation of the apparatus;..Fig. 2 is a side elevation; .Fig. 3 is a detail side elevation of the stem holder; Fig. 4 is an end view of Fig. 3; Fig.--5 is a partial plan View of Fig. 3; Fig. 6 is a bottom view of Fig. 3 Fig. 7 is a bottom plan view of a filament holder; Fig. 8 is a side elevation; and Fig.

9 is a view looking toward the left of Fig. 7. v In the machine shown in the drawings the stem holding devices and the filament holdingd'evices are especially designed forthemanual introduction of the stems and filaments and these devices are so mounted times a relative movement between the devices is effected which brings the filament ends and stem wires together where they are-united by cement and subsequently causes a separation of the devices to the rela- .tive position where the filaments and stems are introwith the cement applying devices to apply cement to the ends of the stem wires.

drawings the-stem holding device comprises a support B pfovided with a. laterally projecting plate or arms B which is provided at its outer end with a semi-circular recess B for engaging the rear part of the stem A. The support B also carries a laterally projecting plate B provided at its outer end with recesses 13 for receiving the stem wires a. The stem A is held in position in the supporting plate B and with the front end of the stem in engagement with the plate 13 by means of a flat spring B which is arranged to engage the rear end of the stem and force it forward and inwardtoward the support B. The pressure of the" spring therefore holds same time tends to rock th'e'stem about the plate B In embodying the broader features of the invention that they at certain times move in unison and at other duced and where the stem carrying devices cooperate Referring in detail to the construction shown in the the stem firmly in the recess in the plate B and at the merits, or to these parts after they are brought together,

in which are formed recesses C for receiving and po:

. bythe clamping member C of a lever C. The lever the recesses B The recesses B are provided with which have no such anchoring wires.

. pin C on the lever G to which the spring is connected toms of the recesses and thus into proper position. After the carbon hasbeen introduced the clamping .sil ion upon a rotary disk E as indicated in Fig. 2 and and thus maintain the stem wires a in the bottoms of converging sides so that the wires a may be readily introduced into these recesses and may be guided into the bottoms of the recesses which are the proper.distance apart to properly position the stem wires a. This stem holding device is designed to carry a. lamp stem having two projecting stem wires and is also adapted to support and carry such stems when provided with anchoring wires a or may be employed for carrying stems I The plate B is provided with a recess B for the passage of the anchor wire in case-"the support is used for stems having I s such anchor wires.

The filament holding device shown in the accompapanying drawings consists of a standard or support C provided at its outer end with two ribs or plates C sitioning the ends of a carbon filament D The re-- cesses C are provided with converging surfaces which guide the ends of the filaments intothe bottoms of the recesses. The recesses C are separated by a space substantially the same as the space between the recesses B and serve to maintain the ends of the carbon filaments substantially the same distance apart that the wires (1 are maintained by the recesses. 13. The end of the support 0 between the plates C serves as asurl'ace against which the filament may be clamped O is held in position to clamp the filament in position by means of a spring C connected to the standard 0 and to the lever so that when the lever is in clamping position the spring acts in front of the pivot oi the lever C as indicated in Fig. 8. When the clamping lever is swung about its pivot to carry the clamping member C away from the surface between the plates C, the

is carried to the rear of the pivot oi the lever so that the spring acts to hold the clamping lever in its open position against the stop ,When the clamping lever is in this position the'carbon filament may be readily introduced into the recesses G the sides of the recesses acting to guide the ends oithe-filament into the hotlever may be closed and willact to retain the carbon in positiomin the filament holder.

The filament holding device is secured in fixed poin dotted lines in Fig. 1. The stem holding device is aiso mounted upon the carrying disk E and the relative movement between the stem holder and the filament holder is effected by moving the stem holder as the carrier disk rotates. In order that the desired movements may be given to the stem holder, the support B for the stem holder is'forlned upon a slide B which extends at right-angles to the support)? and is mounted in. guideways formed in a second slide E the second slide being mounted in guidcways B secured. to the disk E. The guidewayaB" for the slide B extend radially of the disk E sothat by moving the slide B toward and away from the center of the disk E stem holder maybe moved toward or away from the filament holder which is secured upon the disk E between the slide B and the center of the disk. The ways 13 within which the slide B of the stem holding device is supported and guided, extend at right angles to the ways B upon the disk E so that by moving the slide B in the ways B the stem holding device may be moved toward or away from the face of the disk D and thus the wires a of the stem carried in the stem holding t device may be moved into or out of line with the ends 3 of the filament carried inthe filament holding device.

end secured to a pin B. projecting from the slide 13 and the other end secured to a pin B projecting from one of the ways B on the slide B When the slide B and support B are in position with the slide B against the slide B the recesses 13 in the stem holding device are in substantial alinement with the recesses C in the filament holding device and a radial inward movement of the slide B with the parts in this position will bring the wires a of a stem carried by the stem holder into juxtaposition with the ends of the filament D carried in the filament holder.

The radial movements of the slide 13 are effected during the rotation of the disk E by means of a fixed cam 13* provided with a cam groove which is engaged by a roll B on the slide B The cam B is properly shaped to move the slide B radially inward at the propertime to bringthe stem wires and filament ends into juxtaposition and to move the slide radially outward atthe proper time to carry the stem holder away from the filament holder. 7

The lateral movements of the stem holder which are effected by the cam B are for the purpose of bringing the stem holder into position to cooperate with the cement applying device and to thereafter return the stem holder into position in line with the filament holding device. I i

In the construction shown the cement applying device consists of two rolls F mountedin a stationary bracket F and arranged in position" wherethe stem wires a will travel close to the surface of the rolls during the movements imparted to the stem holder by the rotation of the disk E. Cement is supplied to the surface of, the rolls F through pipes F in the proper quantities to keep the required supply of cement upon the surfaces of the rolls.

In order that the cementing of the filaments to the stem wires may be effected rapidly, the disk E carries a series oi filament holding devices and also a corresponding series of stem holding devices, the stem holdingdevices and filament holding devices being successively brought into the positions where the stems and filaments are introduced therein and the stem holding devices beingbrought in succession in position to co-. operate with the cement applying rolls and then into, position to bring the stem wires into juxtapositiondisk cooperating with a series of radial slots E and a series of locking segments E formed in a disk E which is secured to the rear face of thedisk E. The crank disk E is continuously rotated through a pulley E which is secured to the shaft E upon which thecrank disk E is secured. The disk E is .looselymounted upon a stud E By the rotation of the shaft E the disk E is intermittently rotated, the disk being advanced during each rotation of the shaft E through a distance equal to the distance between the successive filament carrying and stem carrying device's. The cement applying rolls F are rotated during th movement of the stem holders at a surface speed substantially equal to the speed of movement of the stem holders so that the stem wires tip into the cement upon the rolls and are withdrawn without any substantial lateral movement of the wires in the cement. By this action the wires take up small globules of cement from the first roll which are increased in size by the introduction of the wires into the cement of the second roll. The cement rolls F are rotated during the rotation of the disk E by means of gearing'connectingthe diskE with the rolls. This gearing consists of a gear F secured to the disk E and engaging a pinion F secured to the end of ashai't which is mounted in the bracket F and is provided at its outer end with a. gear F meshing with gears F on the cement roll shafts.

During the operation of the machine the filaments are introduced into the filament holders and the stems are introduced into the stem holders by operators as these holders come successively into convenient position for the introduction of the parts and subsequently the stem holder is moved to bring the stem wires into contact with the cement rolls and then to move the.v

stein holder to bring the stem wires and ends of the filamcnts together so that they are united by the cement applied to the stem wires. During the subsequent movement,oi' the stem holders and filament holders, the clamping lover C of the filament holder is brought against a fixed cam arm G which operates to open the clamp arm so that the filament is free to be removed with the stem and the filament holder isin condition for the ready insertion of a new filament by the ope1'-.

ment holders are not essential and that other forms of stem holders and filament holders may be employed.

In using the construction shown for cementing filaments to the stem wires for lamps in which there is an anchor wire for the coil of the filament, the anchor wire should be bent into position where it will not be brought against the cement rolls, as indicated in dotted lines at ain Fig. 3.

It will also be understood that various changes and modifications may be made in the construction and arrangement of parts and in the forms of mechanisms employed and in the devices and constructions for giving 1. An apparatus for cem nting the filaments of electric lamps to the stem wii'e'sj, comprising a stem-holding device, a filament Holding device, and means operating tofcause :1 relative movement between the devices which brings a wire-and filament end into juxtaposition.

2. An apparatus for cementing the filaments ofelectric lamps to the stem wires comprising a stem holding device, a filament holding device, means for applying cement to the part carried by one of the holding devices, and means for causing a relative movement between the holding devices to bring a stem wire and filament end together.

3. An apparatus for cementing the filaments of electric 1 lamps to the stem wires, comprising a stem holding device,

a filament holding device, means for applying cement, and means for moving the stem holding device into position for applying cement to a stem wire and into position to bring the stem wire and a filament end together.

-i. "An apparatus for cementing the filaments of electric lamps to the stem wires comprising a stem holding device, means for applying cement to astem wire, and means whereby the filament end and stem wire may be brought together.

5. An apparatus for cementing the. filaments of electric lamps to the stem wires comprising a stem holding device, means for applying cement to a stem wire, a filament holding device and means for causing a relative movement of the holding devices to bring the wire and filament end together.

6. An apparatus for cementing the filaments of electric lamps to the stem wires comprising devices for positioning a stem with the stem wires in definite relation, devices for positioning a filament with the ends in a corresponding definite relation, and means for'supporting said devices for relative movement.

F 7. An apparatus for cementing'the filaments of electric lamps to the stem wires comprising, a series of stem holding' devices, a series of filament holding devices,'means for advancing each series of holding devices and means for causing a relative movement between corresponding holding devices in the two series to bring the fi lame ntends and stem wires together.

8. An apparatus for cementing the filaments of electric lamps to the stem wires comprising a series of stem holding devices, a series of filament holding devices, means for applying cement, means for bringing the holding devices of one series successively to the cement applying device, and means for causing a relative movement between corresponding holding devices in the two series to bring a filament end and stem wire together! 9. An apparatus for cementing the filaments of electric lamps to the stem wires comprising a series of stem holding devices, a series of filament holding devices, means for applying cement, means for bringing the stem holding devices in succession to the cement device, and then into position to bring the stem Wires and filament ends of corresponding holding devices in the two series together.

10. An apparatus for cementing the filaments of electric lamps to the stem'wires comprising a series of stem holding devices, a series of filament holding devices, means operating to bring holding devices of .each series successively into position with the filament ends and stem wires in juxtaposition. V p

11. An apparatus for cementing the filaments of electric lamps to the stem wires comprising devices for holding- .stems and determining the positions of the stem wires,

correspondingly positioned, and means for supporting said lamps to the stem wires comprising devices for holding the movement of said Supporting devices to bring the stem wires and'filament ends into juxtaposition.

In witness whereofpl have hereunto set my hand, this 26th day of January 1906.

devices for holding the filaments with the filament ends devices for relative movement.

13. An apparatus for cementing' the filaments of electric lamps to the stem wires, comprising devices for positioning the stem wires, devices for engaging and positioning I NQRMAN MARSHALL.

In presence of Int L. FISH,

12. An apparatus for cementing the filaments of electric the filament ends, and means operating to cause a relative 10 KATHARINE A. DUGAN. 

